| Everett M. Greene 2006-07-19, 7:01 pm |
| "Shmuel (Seymour J.) Metz" <spamtrap@library.lspace.org.invalid> writes:
> mojaveg@mojaveg.lsan.sisna.com (Everett M. Greene) said:
>
>
> FSVO "some" equal to "all".
>
>
> That makes no sense.
>
>
> 0+(-0)?
A subtractive adder.
>
> I never saw a need to test for it regardless. Every 1s complement
> machine I know of lets you test for zero in a single instruction.
Try the Univac mainframes.
I once got bagged by one of a Univac-designed machine that
did 0 x n = -0 for any negative value of n. This wasn't
the way it should work, but it worked that way to be
compatible with an earlier machine. ["It's a mistake, but
we are consistently wrong."]
>
> Before the S/360 captured the market there were large numbers of
> machines in the lines started with the CDC 160, CDC 6660 and the
> UNIVAC 1107. The shift seemed to be a copycat issue more than a
> technological one.
|